The Hirz Fire burning north of Lake Shasta grew by more than 3,000 acres overnight to 45,289 acres, the U.S. Forest Service said Monday morning.

While crews were able to successfully hold and strengthen control lines around the western and northern portions of the fire, containment of the Hirz Fire didn't budge overnight and remained at 46 percent.

Firefighters also increased containment along several sections of the perimeter where the fire now is at no risk of escaping, the Forest Service said.